การพัฒนาตัวแบบถดถอยสำหรับการคำนวณต้นทุนขั้นต้นงานก่อสร้าง อาคารขนาดใหญ่ ในเขตจังหวัดร้อยเอ็ด

The purpose of this research was to study level of the preliminary cost calculate for a large building in Roi Et province and to study the factors that affected on initial cost reduction of large building constructions in Roi Et province. The sample group used in this research were devisers supervisors project managers and construction contractors in Roi Et province. There were 5 projects with a total of 145 people. The instruments used in the research were a 5 level rating estimation questionnaire. Data were analyzed by using frequency percentage mean standard deviation and the hypothesis tested by using Multiple Linear Regression with (Enter Regression). The result of the research shows that An analysis of opinion on principal control of large building constructions in Roi Et province. It was found that the practice level was at the highest level. Which is arranged in order from the highest average to the lowest namely machinery cost material cost contractor cost operating cost and labor costs respectively. and The analysis of Regression Model Development for Preliminary Calculate Cost of construction works had resulted in lowering the initial cost of large building constructions in Roi Et Province of 5 factors included structural design architectural design interior design system design and exterior design. Resulting in reducing the initial cost of large building constructions in Roi Et province with statistical significance at the level of .01 level.